Improvement in the manufacture of lubricating-oil



UNITED ST TES- PATENT OFFICE.

HENRY T. SLEMMER, OF NORRISTOWN, PENNSYLVANIA.

IMPROVEMENT IN THE MANUFACTURE OF LUBRlCATlNG-OIL.

Specification forming part of Letters Patent No. 52,897, dated February 27, 1866.

To all whom it may concern:

Be it known that I, HENRY T. SLEMMER, M. D., of the borough of Norristown, in the county of Montgomery, in the State of Pennsylvania, have invented a new and Improved Method of Producing Lubricating-Oil from the Heavy Distillate of Petroleum, of which the following is a specification.

The nature of this process consists in returnin g to the still the heavy products of the distillation ofpetroleum. denominated naphtha- Washed with hot water to remove the alkali.

The object of the alkali is to remove the free acid produced by the distillation. It is then allowed to subside, the oily product being drawn off into another receiver. This is then frozen to crystallize the naphthaline and paraffine. The oil is then strained from the crystallized products at a temperature of 26 to 40 Fahrenheit. This produces an oil of 30 to 33 Baums hydrometer, of great lubricating properties; freer from gum or acid, and adapted equally well for light or heavy bearings.

I claim 1. The production of an oil of the gravity as herein set forth and the rejecting of the first products of the distillate until it approximates 38 Baums liydrometer, and subsequent Washin g and treatment, as described.

2. As a new manufacture, the lubricatingoil prepared substantially as described.

HENRY T. SLEMMER, M. D.

Witnesses R. (J. WEIGHTMAN, Enwn. J FARQUHAR. 

